... JIS GB, CB, CBM, and JLC standard, can be extensively used in marine. With the nominal diameters of 15-300mm and ... in design, reliability in function and anti-flow backward, used on air pipes of desk in oil tank, seawater tank and fresh ... JIS GB, CB, CBM, and JLC standard, can be extensively used in marine. Cast Steel Flange Connesction Turbine Ball Valves